US2765447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning device
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1951-11-06
•
Granted: 1956-10-02
•
Expires: 1971-11-06
Abstract
No abstract record available.
Inventors
- 👤 Henry R Hesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:47
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2113758A
Cited
US2126541A
Cited
US2262365A
Cited
US2522370A
Cited
US2543042A
Cited
US2463417A
Cited
US2482393A
Cited
US2551228A
Cited
US2627579A
Cited
US2543560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |